== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:34:25 (1781235265)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.88223 s, 15.2 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9abe090e9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.730461
Iter 1/10: OSS cache speed: 0.88133
Iter 1/10: ladvise speed: 0.867095
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.818346
Iter 2/10: OSS cache speed: 0.919449
Iter 2/10: ladvise speed: 0.940326
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.816863
Iter 3/10: OSS cache speed: 0.913636
Iter 3/10: ladvise speed: 0.885507
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.736465
Iter 4/10: OSS cache speed: 1.05967
Iter 4/10: ladvise speed: 0.991193
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.896493
Iter 5/10: OSS cache speed: 0.985376
Iter 5/10: ladvise speed: 1.04241
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.959107
Iter 6/10: OSS cache speed: 1.08104
Iter 6/10: ladvise speed: 1.08851
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.963071
Iter 7/10: OSS cache speed: 1.24572
Iter 7/10: ladvise speed: 1.25507
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.0139
Iter 8/10: OSS cache speed: 0.976719
Iter 8/10: ladvise speed: 1.23373
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.02979
Iter 9/10: OSS cache speed: 1.02226
Iter 9/10: ladvise speed: 1.16471
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.02726
Iter 10/10: OSS cache speed: 1.12104
Iter 10/10: ladvise speed: 1.18856
Average uncached read: .89
Average speedup with OSS cached read:  1.02 = +14%
Average speedup with ladvise willread:  1.06 = +19%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0